drivers/infiniband/hw/efa/efa_verbs.c

   1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
   2 /*
   3  * Copyright 2018-2023 Amazon.com, Inc. or its affiliates. All rights reserved.
   4  */
   5
   6 #include <linux/dma-buf.h>
   7 #include <linux/dma-resv.h>
   8 #include <linux/vmalloc.h>
   9 #include <linux/log2.h>
  10
  11 #include <rdma/ib_addr.h>
  12 #include <rdma/ib_umem.h>
  13 #include <rdma/ib_user_verbs.h>
  14 #include <rdma/ib_verbs.h>
  15 #include <rdma/uverbs_ioctl.h>
  16
  17 #include "efa.h"
  18 #include "efa_io_defs.h"
  19
  20 enum {
  21         EFA_MMAP_DMA_PAGE = 0,
  22         EFA_MMAP_IO_WC,
  23         EFA_MMAP_IO_NC,
  24 };
  25
  26 #define EFA_AENQ_ENABLED_GROUPS \
  27         (BIT(EFA_ADMIN_FATAL_ERROR) | BIT(EFA_ADMIN_WARNING) | \
  28          BIT(EFA_ADMIN_NOTIFICATION) | BIT(EFA_ADMIN_KEEP_ALIVE))
  29
  30 struct efa_user_mmap_entry {
  31         struct rdma_user_mmap_entry rdma_entry;
  32         u64 address;
  33         u8 mmap_flag;
  34 };
  35
  36 #define EFA_DEFINE_DEVICE_STATS(op) \
  37         op(EFA_SUBMITTED_CMDS, "submitted_cmds") \
  38         op(EFA_COMPLETED_CMDS, "completed_cmds") \
  39         op(EFA_CMDS_ERR, "cmds_err") \
  40         op(EFA_NO_COMPLETION_CMDS, "no_completion_cmds") \
  41         op(EFA_KEEP_ALIVE_RCVD, "keep_alive_rcvd") \
  42         op(EFA_ALLOC_PD_ERR, "alloc_pd_err") \
  43         op(EFA_CREATE_QP_ERR, "create_qp_err") \
  44         op(EFA_CREATE_CQ_ERR, "create_cq_err") \
  45         op(EFA_REG_MR_ERR, "reg_mr_err") \
  46         op(EFA_ALLOC_UCONTEXT_ERR, "alloc_ucontext_err") \
  47         op(EFA_CREATE_AH_ERR, "create_ah_err") \
  48         op(EFA_MMAP_ERR, "mmap_err")
  49
  50 #define EFA_DEFINE_PORT_STATS(op) \
  51         op(EFA_TX_BYTES, "tx_bytes") \
  52         op(EFA_TX_PKTS, "tx_pkts") \
  53         op(EFA_RX_BYTES, "rx_bytes") \
  54         op(EFA_RX_PKTS, "rx_pkts") \
  55         op(EFA_RX_DROPS, "rx_drops") \
  56         op(EFA_SEND_BYTES, "send_bytes") \
  57         op(EFA_SEND_WRS, "send_wrs") \
  58         op(EFA_RECV_BYTES, "recv_bytes") \
  59         op(EFA_RECV_WRS, "recv_wrs") \
  60         op(EFA_RDMA_READ_WRS, "rdma_read_wrs") \
  61         op(EFA_RDMA_READ_BYTES, "rdma_read_bytes") \
  62         op(EFA_RDMA_READ_WR_ERR, "rdma_read_wr_err") \
  63         op(EFA_RDMA_READ_RESP_BYTES, "rdma_read_resp_bytes") \
  64         op(EFA_RDMA_WRITE_WRS, "rdma_write_wrs") \
  65         op(EFA_RDMA_WRITE_BYTES, "rdma_write_bytes") \
  66         op(EFA_RDMA_WRITE_WR_ERR, "rdma_write_wr_err") \
  67         op(EFA_RDMA_WRITE_RECV_BYTES, "rdma_write_recv_bytes") \
  68
  69 #define EFA_STATS_ENUM(ename, name) ename,
  70 #define EFA_STATS_STR(ename, nam) \
  71         [ename].name = nam,
  72
  73 enum efa_hw_device_stats {
  74         EFA_DEFINE_DEVICE_STATS(EFA_STATS_ENUM)
  75 };
  76
  77 static const struct rdma_stat_desc efa_device_stats_descs[] = {
  78         EFA_DEFINE_DEVICE_STATS(EFA_STATS_STR)
  79 };
  80
  81 enum efa_hw_port_stats {
  82         EFA_DEFINE_PORT_STATS(EFA_STATS_ENUM)
  83 };
  84
  85 static const struct rdma_stat_desc efa_port_stats_descs[] = {
  86         EFA_DEFINE_PORT_STATS(EFA_STATS_STR)
  87 };
  88
  89 #define EFA_CHUNK_PAYLOAD_SHIFT       12
  90 #define EFA_CHUNK_PAYLOAD_SIZE        BIT(EFA_CHUNK_PAYLOAD_SHIFT)
  91 #define EFA_CHUNK_PAYLOAD_PTR_SIZE    8
  92
  93 #define EFA_CHUNK_SHIFT               12
  94 #define EFA_CHUNK_SIZE                BIT(EFA_CHUNK_SHIFT)
  95 #define EFA_CHUNK_PTR_SIZE            sizeof(struct efa_com_ctrl_buff_info)
  96
  97 #define EFA_PTRS_PER_CHUNK \
  98         ((EFA_CHUNK_SIZE - EFA_CHUNK_PTR_SIZE) / EFA_CHUNK_PAYLOAD_PTR_SIZE)
  99
 100 #define EFA_CHUNK_USED_SIZE \
 101         ((EFA_PTRS_PER_CHUNK * EFA_CHUNK_PAYLOAD_PTR_SIZE) + EFA_CHUNK_PTR_SIZE)
 102
 103 struct pbl_chunk {
 104         dma_addr_t dma_addr;
 105         u64 *buf;
 106         u32 length;
 107 };
 108
 109 struct pbl_chunk_list {
 110         struct pbl_chunk *chunks;
 111         unsigned int size;
 112 };
 113
 114 struct pbl_context {
 115         union {
 116                 struct {
 117                         dma_addr_t dma_addr;
 118                 } continuous;
 119                 struct {
 120                         u32 pbl_buf_size_in_pages;
 121                         struct scatterlist *sgl;
 122                         int sg_dma_cnt;
 123                         struct pbl_chunk_list chunk_list;
 124                 } indirect;
 125         } phys;
 126         u64 *pbl_buf;
 127         u32 pbl_buf_size_in_bytes;
 128         u8 physically_continuous;
 129 };
 130
 131 static inline struct efa_dev *to_edev(struct ib_device *ibdev)
 132 {
 133         return container_of(ibdev, struct efa_dev, ibdev);
 134 }
 135
 136 static inline struct efa_ucontext *to_eucontext(struct ib_ucontext *ibucontext)
 137 {
 138         return container_of(ibucontext, struct efa_ucontext, ibucontext);
 139 }
 140
 141 static inline struct efa_pd *to_epd(struct ib_pd *ibpd)
 142 {
 143         return container_of(ibpd, struct efa_pd, ibpd);
 144 }
 145
 146 static inline struct efa_mr *to_emr(struct ib_mr *ibmr)
 147 {
 148         return container_of(ibmr, struct efa_mr, ibmr);
 149 }
 150
 151 static inline struct efa_qp *to_eqp(struct ib_qp *ibqp)
 152 {
 153         return container_of(ibqp, struct efa_qp, ibqp);
 154 }
 155
 156 static inline struct efa_cq *to_ecq(struct ib_cq *ibcq)
 157 {
 158         return container_of(ibcq, struct efa_cq, ibcq);
 159 }
 160
 161 static inline struct efa_ah *to_eah(struct ib_ah *ibah)
 162 {
 163         return container_of(ibah, struct efa_ah, ibah);
 164 }
 165
 166 static inline struct efa_user_mmap_entry *
 167 to_emmap(struct rdma_user_mmap_entry *rdma_entry)
 168 {
 169         return container_of(rdma_entry, struct efa_user_mmap_entry, rdma_entry);
 170 }
 171
 172 #define EFA_DEV_CAP(dev, cap) \
 173         ((dev)->dev_attr.device_caps & \
 174          EFA_ADMIN_FEATURE_DEVICE_ATTR_DESC_##cap##_MASK)
 175
 176 #define is_reserved_cleared(reserved) \
 177         !memchr_inv(reserved, 0, sizeof(reserved))
 178
 179 static void *efa_zalloc_mapped(struct efa_dev *dev, dma_addr_t *dma_addr,
 180                                size_t size, enum dma_data_direction dir)
 181 {
 182         void *addr;
 183
 184         addr = alloc_pages_exact(size, GFP_KERNEL | __GFP_ZERO);
 185         if (!addr)
 186                 return NULL;
 187
 188         *dma_addr = dma_map_single(&dev->pdev->dev, addr, size, dir);
 189         if (dma_mapping_error(&dev->pdev->dev, *dma_addr)) {
 190                 ibdev_err(&dev->ibdev, "Failed to map DMA address\n");
 191                 free_pages_exact(addr, size);
 192                 return NULL;
 193         }
 194
 195         return addr;
 196 }
 197
 198 static void efa_free_mapped(struct efa_dev *dev, void *cpu_addr,
 199                             dma_addr_t dma_addr,
 200                             size_t size, enum dma_data_direction dir)
 201 {
 202         dma_unmap_single(&dev->pdev->dev, dma_addr, size, dir);
 203         free_pages_exact(cpu_addr, size);
 204 }
 205
 206 int efa_query_device(struct ib_device *ibdev,
 207                      struct ib_device_attr *props,
 208                      struct ib_udata *udata)
 209 {
 210         struct efa_com_get_device_attr_result *dev_attr;
 211         struct efa_ibv_ex_query_device_resp resp = {};
 212         struct efa_dev *dev = to_edev(ibdev);
 213         int err;
 214
 215         if (udata && udata->inlen &&
 216             !ib_is_udata_cleared(udata, 0, udata->inlen)) {
 217                 ibdev_dbg(ibdev,
 218                           "Incompatible ABI params, udata not cleared\n");
 219                 return -EINVAL;
 220         }
 221
 222         dev_attr = &dev->dev_attr;
 223
 224         memset(props, 0, sizeof(*props));
 225         props->max_mr_size = dev_attr->max_mr_pages * PAGE_SIZE;
 226         props->page_size_cap = dev_attr->page_size_cap;
 227         props->vendor_id = dev->pdev->vendor;
 228         props->vendor_part_id = dev->pdev->device;
 229         props->hw_ver = dev->pdev->subsystem_device;
 230         props->max_qp = dev_attr->max_qp;
 231         props->max_cq = dev_attr->max_cq;
 232         props->max_pd = dev_attr->max_pd;
 233         props->max_mr = dev_attr->max_mr;
 234         props->max_ah = dev_attr->max_ah;
 235         props->max_cqe = dev_attr->max_cq_depth;
 236         props->max_qp_wr = min_t(u32, dev_attr->max_sq_depth,
 237                                  dev_attr->max_rq_depth);
 238         props->max_send_sge = dev_attr->max_sq_sge;
 239         props->max_recv_sge = dev_attr->max_rq_sge;
 240         props->max_sge_rd = dev_attr->max_wr_rdma_sge;
 241         props->max_pkeys = 1;
 242
 243         if (udata && udata->outlen) {
 244                 resp.max_sq_sge = dev_attr->max_sq_sge;
 245                 resp.max_rq_sge = dev_attr->max_rq_sge;
 246                 resp.max_sq_wr = dev_attr->max_sq_depth;
 247                 resp.max_rq_wr = dev_attr->max_rq_depth;
 248                 resp.max_rdma_size = dev_attr->max_rdma_size;
 249
 250                 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_CQ_WITH_SGID;
 251                 if (EFA_DEV_CAP(dev, RDMA_READ))
 252                         resp.device_caps |= EFA_QUERY_DEVICE_CAPS_RDMA_READ;
 253
 254                 if (EFA_DEV_CAP(dev, RNR_RETRY))
 255                         resp.device_caps |= EFA_QUERY_DEVICE_CAPS_RNR_RETRY;
 256
 257                 if (EFA_DEV_CAP(dev, DATA_POLLING_128))
 258                         resp.device_caps |= EFA_QUERY_DEVICE_CAPS_DATA_POLLING_128;
 259
 260                 if (EFA_DEV_CAP(dev, RDMA_WRITE))
 261                         resp.device_caps |= EFA_QUERY_DEVICE_CAPS_RDMA_WRITE;
 262
 263                 if (dev->neqs)
 264                         resp.device_caps |= EFA_QUERY_DEVICE_CAPS_CQ_NOTIFICATIONS;
 265
 266                 err = ib_copy_to_udata(udata, &resp,
 267                                        min(sizeof(resp), udata->outlen));
 268                 if (err) {
 269                         ibdev_dbg(ibdev,
 270                                   "Failed to copy udata for query_device\n");
 271                         return err;
 272                 }
 273         }
 274
 275         return 0;
 276 }
 277
 278 int efa_query_port(struct ib_device *ibdev, u32 port,
 279                    struct ib_port_attr *props)
 280 {
 281         struct efa_dev *dev = to_edev(ibdev);
 282
 283         props->lmc = 1;
 284
 285         props->state = IB_PORT_ACTIVE;
 286         props->phys_state = IB_PORT_PHYS_STATE_LINK_UP;
 287         props->gid_tbl_len = 1;
 288         props->pkey_tbl_len = 1;
 289         props->active_speed = IB_SPEED_EDR;
 290         props->active_width = IB_WIDTH_4X;
 291         props->max_mtu = ib_mtu_int_to_enum(dev->dev_attr.mtu);
 292         props->active_mtu = ib_mtu_int_to_enum(dev->dev_attr.mtu);
 293         props->max_msg_sz = dev->dev_attr.mtu;
 294         props->max_vl_num = 1;
 295
 296         return 0;
 297 }
 298
 299 int efa_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
 300                  int qp_attr_mask,
 301                  struct ib_qp_init_attr *qp_init_attr)
 302 {
 303         struct efa_dev *dev = to_edev(ibqp->device);
 304         struct efa_com_query_qp_params params = {};
 305         struct efa_com_query_qp_result result;
 306         struct efa_qp *qp = to_eqp(ibqp);
 307         int err;
 308
 309 #define EFA_QUERY_QP_SUPP_MASK \
 310         (IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT | \
 311          IB_QP_QKEY | IB_QP_SQ_PSN | IB_QP_CAP | IB_QP_RNR_RETRY)
 312
 313         if (qp_attr_mask & ~EFA_QUERY_QP_SUPP_MASK) {
 314                 ibdev_dbg(&dev->ibdev,
 315                           "Unsupported qp_attr_mask[%#x] supported[%#x]\n",
 316                           qp_attr_mask, EFA_QUERY_QP_SUPP_MASK);
 317                 return -EOPNOTSUPP;
 318         }
 319
 320         memset(qp_attr, 0, sizeof(*qp_attr));
 321         memset(qp_init_attr, 0, sizeof(*qp_init_attr));
 322
 323         params.qp_handle = qp->qp_handle;
 324         err = efa_com_query_qp(&dev->edev, &params, &result);
 325         if (err)
 326                 return err;
 327
 328         qp_attr->qp_state = result.qp_state;
 329         qp_attr->qkey = result.qkey;
 330         qp_attr->sq_psn = result.sq_psn;
 331         qp_attr->sq_draining = result.sq_draining;
 332         qp_attr->port_num = 1;
 333         qp_attr->rnr_retry = result.rnr_retry;
 334
 335         qp_attr->cap.max_send_wr = qp->max_send_wr;
 336         qp_attr->cap.max_recv_wr = qp->max_recv_wr;
 337         qp_attr->cap.max_send_sge = qp->max_send_sge;
 338         qp_attr->cap.max_recv_sge = qp->max_recv_sge;
 339         qp_attr->cap.max_inline_data = qp->max_inline_data;
 340
 341         qp_init_attr->qp_type = ibqp->qp_type;
 342         qp_init_attr->recv_cq = ibqp->recv_cq;
 343         qp_init_attr->send_cq = ibqp->send_cq;
 344         qp_init_attr->qp_context = ibqp->qp_context;
 345         qp_init_attr->cap = qp_attr->cap;
 346
 347         return 0;
 348 }
 349
 350 int efa_query_gid(struct ib_device *ibdev, u32 port, int index,
 351                   union ib_gid *gid)
 352 {
 353         struct efa_dev *dev = to_edev(ibdev);
 354
 355         memcpy(gid->raw, dev->dev_attr.addr, sizeof(dev->dev_attr.addr));
 356
 357         return 0;
 358 }
 359
 360 int efa_query_pkey(struct ib_device *ibdev, u32 port, u16 index,
 361                    u16 *pkey)
 362 {
 363         if (index > 0)
 364                 return -EINVAL;
 365
 366         *pkey = 0xffff;
 367         return 0;
 368 }
 369
 370 static int efa_pd_dealloc(struct efa_dev *dev, u16 pdn)
 371 {
 372         struct efa_com_dealloc_pd_params params = {
 373                 .pdn = pdn,
 374         };
 375
 376         return efa_com_dealloc_pd(&dev->edev, &params);
 377 }
 378
 379 int efa_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
 380 {
 381         struct efa_dev *dev = to_edev(ibpd->device);
 382         struct efa_ibv_alloc_pd_resp resp = {};
 383         struct efa_com_alloc_pd_result result;
 384         struct efa_pd *pd = to_epd(ibpd);
 385         int err;
 386
 387         if (udata->inlen &&
 388             !ib_is_udata_cleared(udata, 0, udata->inlen)) {
 389                 ibdev_dbg(&dev->ibdev,
 390                           "Incompatible ABI params, udata not cleared\n");
 391                 err = -EINVAL;
 392                 goto err_out;
 393         }
 394
 395         err = efa_com_alloc_pd(&dev->edev, &result);
 396         if (err)
 397                 goto err_out;
 398
 399         pd->pdn = result.pdn;
 400         resp.pdn = result.pdn;
 401
 402         if (udata->outlen) {
 403                 err = ib_copy_to_udata(udata, &resp,
 404                                        min(sizeof(resp), udata->outlen));
 405                 if (err) {
 406                         ibdev_dbg(&dev->ibdev,
 407                                   "Failed to copy udata for alloc_pd\n");
 408                         goto err_dealloc_pd;
 409                 }
 410         }
 411
 412         ibdev_dbg(&dev->ibdev, "Allocated pd[%d]\n", pd->pdn);
 413
 414         return 0;
 415
 416 err_dealloc_pd:
 417         efa_pd_dealloc(dev, result.pdn);
 418 err_out:
 419         atomic64_inc(&dev->stats.alloc_pd_err);
 420         return err;
 421 }
 422
 423 int efa_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
 424 {
 425         struct efa_dev *dev = to_edev(ibpd->device);
 426         struct efa_pd *pd = to_epd(ibpd);
 427
 428         ibdev_dbg(&dev->ibdev, "Dealloc pd[%d]\n", pd->pdn);
 429         efa_pd_dealloc(dev, pd->pdn);
 430         return 0;
 431 }
 432
 433 static int efa_destroy_qp_handle(struct efa_dev *dev, u32 qp_handle)
 434 {
 435         struct efa_com_destroy_qp_params params = { .qp_handle = qp_handle };
 436
 437         return efa_com_destroy_qp(&dev->edev, &params);
 438 }
 439
 440 static void efa_qp_user_mmap_entries_remove(struct efa_qp *qp)
 441 {
 442         rdma_user_mmap_entry_remove(qp->rq_mmap_entry);
 443         rdma_user_mmap_entry_remove(qp->rq_db_mmap_entry);
 444         rdma_user_mmap_entry_remove(qp->llq_desc_mmap_entry);
 445         rdma_user_mmap_entry_remove(qp->sq_db_mmap_entry);
 446 }
 447
 448 int efa_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata)
 449 {
 450         struct efa_dev *dev = to_edev(ibqp->pd->device);
 451         struct efa_qp *qp = to_eqp(ibqp);
 452         int err;
 453
 454         ibdev_dbg(&dev->ibdev, "Destroy qp[%u]\n", ibqp->qp_num);
 455
 456         err = efa_destroy_qp_handle(dev, qp->qp_handle);
 457         if (err)
 458                 return err;
 459
 460         efa_qp_user_mmap_entries_remove(qp);
 461
 462         if (qp->rq_cpu_addr) {
 463                 ibdev_dbg(&dev->ibdev,
 464                           "qp->cpu_addr[0x%p] freed: size[%lu], dma[%pad]\n",
 465                           qp->rq_cpu_addr, qp->rq_size,
 466                           &qp->rq_dma_addr);
 467                 efa_free_mapped(dev, qp->rq_cpu_addr, qp->rq_dma_addr,
 468                                 qp->rq_size, DMA_TO_DEVICE);
 469         }
 470
 471         return 0;
 472 }
 473
 474 static struct rdma_user_mmap_entry*
 475 efa_user_mmap_entry_insert(struct ib_ucontext *ucontext,
 476                            u64 address, size_t length,
 477                            u8 mmap_flag, u64 *offset)
 478 {
 479         struct efa_user_mmap_entry *entry = kzalloc(sizeof(*entry), GFP_KERNEL);
 480         int err;
 481
 482         if (!entry)
 483                 return NULL;
 484
 485         entry->address = address;
 486         entry->mmap_flag = mmap_flag;
 487
 488         err = rdma_user_mmap_entry_insert(ucontext, &entry->rdma_entry,
 489                                           length);
 490         if (err) {
 491                 kfree(entry);
 492                 return NULL;
 493         }
 494         *offset = rdma_user_mmap_get_offset(&entry->rdma_entry);
 495
 496         return &entry->rdma_entry;
 497 }
 498
 499 static int qp_mmap_entries_setup(struct efa_qp *qp,
 500                                  struct efa_dev *dev,
 501                                  struct efa_ucontext *ucontext,
 502                                  struct efa_com_create_qp_params *params,
 503                                  struct efa_ibv_create_qp_resp *resp)
 504 {
 505         size_t length;
 506         u64 address;
 507
 508         address = dev->db_bar_addr + resp->sq_db_offset;
 509         qp->sq_db_mmap_entry =
 510                 efa_user_mmap_entry_insert(&ucontext->ibucontext,
 511                                            address,
 512                                            PAGE_SIZE, EFA_MMAP_IO_NC,
 513                                            &resp->sq_db_mmap_key);
 514         if (!qp->sq_db_mmap_entry)
 515                 return -ENOMEM;
 516
 517         resp->sq_db_offset &= ~PAGE_MASK;
 518
 519         address = dev->mem_bar_addr + resp->llq_desc_offset;
 520         length = PAGE_ALIGN(params->sq_ring_size_in_bytes +
 521                             (resp->llq_desc_offset & ~PAGE_MASK));
 522
 523         qp->llq_desc_mmap_entry =
 524                 efa_user_mmap_entry_insert(&ucontext->ibucontext,
 525                                            address, length,
 526                                            EFA_MMAP_IO_WC,
 527                                            &resp->llq_desc_mmap_key);
 528         if (!qp->llq_desc_mmap_entry)
 529                 goto err_remove_mmap;
 530
 531         resp->llq_desc_offset &= ~PAGE_MASK;
 532
 533         if (qp->rq_size) {
 534                 address = dev->db_bar_addr + resp->rq_db_offset;
 535
 536                 qp->rq_db_mmap_entry =
 537                         efa_user_mmap_entry_insert(&ucontext->ibucontext,
 538                                                    address, PAGE_SIZE,
 539                                                    EFA_MMAP_IO_NC,
 540                                                    &resp->rq_db_mmap_key);
 541                 if (!qp->rq_db_mmap_entry)
 542                         goto err_remove_mmap;
 543
 544                 resp->rq_db_offset &= ~PAGE_MASK;
 545
 546                 address = virt_to_phys(qp->rq_cpu_addr);
 547                 qp->rq_mmap_entry =
 548                         efa_user_mmap_entry_insert(&ucontext->ibucontext,
 549                                                    address, qp->rq_size,
 550                                                    EFA_MMAP_DMA_PAGE,
 551                                                    &resp->rq_mmap_key);
 552                 if (!qp->rq_mmap_entry)
 553                         goto err_remove_mmap;
 554
 555                 resp->rq_mmap_size = qp->rq_size;
 556         }
 557
 558         return 0;
 559
 560 err_remove_mmap:
 561         efa_qp_user_mmap_entries_remove(qp);
 562
 563         return -ENOMEM;
 564 }
 565
 566 static int efa_qp_validate_cap(struct efa_dev *dev,
 567                                struct ib_qp_init_attr *init_attr)
 568 {
 569         if (init_attr->cap.max_send_wr > dev->dev_attr.max_sq_depth) {
 570                 ibdev_dbg(&dev->ibdev,
 571                           "qp: requested send wr[%u] exceeds the max[%u]\n",
 572                           init_attr->cap.max_send_wr,
 573                           dev->dev_attr.max_sq_depth);
 574                 return -EINVAL;
 575         }
 576         if (init_attr->cap.max_recv_wr > dev->dev_attr.max_rq_depth) {
 577                 ibdev_dbg(&dev->ibdev,
 578                           "qp: requested receive wr[%u] exceeds the max[%u]\n",
 579                           init_attr->cap.max_recv_wr,
 580                           dev->dev_attr.max_rq_depth);
 581                 return -EINVAL;
 582         }
 583         if (init_attr->cap.max_send_sge > dev->dev_attr.max_sq_sge) {
 584                 ibdev_dbg(&dev->ibdev,
 585                           "qp: requested sge send[%u] exceeds the max[%u]\n",
 586                           init_attr->cap.max_send_sge, dev->dev_attr.max_sq_sge);
 587                 return -EINVAL;
 588         }
 589         if (init_attr->cap.max_recv_sge > dev->dev_attr.max_rq_sge) {
 590                 ibdev_dbg(&dev->ibdev,
 591                           "qp: requested sge recv[%u] exceeds the max[%u]\n",
 592                           init_attr->cap.max_recv_sge, dev->dev_attr.max_rq_sge);
 593                 return -EINVAL;
 594         }
 595         if (init_attr->cap.max_inline_data > dev->dev_attr.inline_buf_size) {
 596                 ibdev_dbg(&dev->ibdev,
 597                           "qp: requested inline data[%u] exceeds the max[%u]\n",
 598                           init_attr->cap.max_inline_data,
 599                           dev->dev_attr.inline_buf_size);
 600                 return -EINVAL;
 601         }
 602
 603         return 0;
 604 }
 605
 606 static int efa_qp_validate_attr(struct efa_dev *dev,
 607                                 struct ib_qp_init_attr *init_attr)
 608 {
 609         if (init_attr->qp_type != IB_QPT_DRIVER &&
 610             init_attr->qp_type != IB_QPT_UD) {
 611                 ibdev_dbg(&dev->ibdev,
 612                           "Unsupported qp type %d\n", init_attr->qp_type);
 613                 return -EOPNOTSUPP;
 614         }
 615
 616         if (init_attr->srq) {
 617                 ibdev_dbg(&dev->ibdev, "SRQ is not supported\n");
 618                 return -EOPNOTSUPP;
 619         }
 620
 621         if (init_attr->create_flags) {
 622                 ibdev_dbg(&dev->ibdev, "Unsupported create flags\n");
 623                 return -EOPNOTSUPP;
 624         }
 625
 626         return 0;
 627 }
 628
 629 int efa_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *init_attr,
 630                   struct ib_udata *udata)
 631 {
 632         struct efa_com_create_qp_params create_qp_params = {};
 633         struct efa_com_create_qp_result create_qp_resp;
 634         struct efa_dev *dev = to_edev(ibqp->device);
 635         struct efa_ibv_create_qp_resp resp = {};
 636         struct efa_ibv_create_qp cmd = {};
 637         struct efa_qp *qp = to_eqp(ibqp);
 638         struct efa_ucontext *ucontext;
 639         int err;
 640
 641         ucontext = rdma_udata_to_drv_context(udata, struct efa_ucontext,
 642                                              ibucontext);
 643
 644         err = efa_qp_validate_cap(dev, init_attr);
 645         if (err)
 646                 goto err_out;
 647
 648         err = efa_qp_validate_attr(dev, init_attr);
 649         if (err)
 650                 goto err_out;
 651
 652         if (offsetofend(typeof(cmd), driver_qp_type) > udata->inlen) {
 653                 ibdev_dbg(&dev->ibdev,
 654                           "Incompatible ABI params, no input udata\n");
 655                 err = -EINVAL;
 656                 goto err_out;
 657         }
 658
 659         if (udata->inlen > sizeof(cmd) &&
 660             !ib_is_udata_cleared(udata, sizeof(cmd),
 661                                  udata->inlen - sizeof(cmd))) {
 662                 ibdev_dbg(&dev->ibdev,
 663                           "Incompatible ABI params, unknown fields in udata\n");
 664                 err = -EINVAL;
 665                 goto err_out;
 666         }
 667
 668         err = ib_copy_from_udata(&cmd, udata,
 669                                  min(sizeof(cmd), udata->inlen));
 670         if (err) {
 671                 ibdev_dbg(&dev->ibdev,
 672                           "Cannot copy udata for create_qp\n");
 673                 goto err_out;
 674         }
 675
 676         if (cmd.comp_mask) {
 677                 ibdev_dbg(&dev->ibdev,
 678                           "Incompatible ABI params, unknown fields in udata\n");
 679                 err = -EINVAL;
 680                 goto err_out;
 681         }
 682
 683         create_qp_params.uarn = ucontext->uarn;
 684         create_qp_params.pd = to_epd(ibqp->pd)->pdn;
 685
 686         if (init_attr->qp_type == IB_QPT_UD) {
 687                 create_qp_params.qp_type = EFA_ADMIN_QP_TYPE_UD;
 688         } else if (cmd.driver_qp_type == EFA_QP_DRIVER_TYPE_SRD) {
 689                 create_qp_params.qp_type = EFA_ADMIN_QP_TYPE_SRD;
 690         } else {
 691                 ibdev_dbg(&dev->ibdev,
 692                           "Unsupported qp type %d driver qp type %d\n",
 693                           init_attr->qp_type, cmd.driver_qp_type);
 694                 err = -EOPNOTSUPP;
 695                 goto err_out;
 696         }
 697
 698         ibdev_dbg(&dev->ibdev, "Create QP: qp type %d driver qp type %#x\n",
 699                   init_attr->qp_type, cmd.driver_qp_type);
 700         create_qp_params.send_cq_idx = to_ecq(init_attr->send_cq)->cq_idx;
 701         create_qp_params.recv_cq_idx = to_ecq(init_attr->recv_cq)->cq_idx;
 702         create_qp_params.sq_depth = init_attr->cap.max_send_wr;
 703         create_qp_params.sq_ring_size_in_bytes = cmd.sq_ring_size;
 704
 705         create_qp_params.rq_depth = init_attr->cap.max_recv_wr;
 706         create_qp_params.rq_ring_size_in_bytes = cmd.rq_ring_size;
 707         qp->rq_size = PAGE_ALIGN(create_qp_params.rq_ring_size_in_bytes);
 708         if (qp->rq_size) {
 709                 qp->rq_cpu_addr = efa_zalloc_mapped(dev, &qp->rq_dma_addr,
 710                                                     qp->rq_size, DMA_TO_DEVICE);
 711                 if (!qp->rq_cpu_addr) {
 712                         err = -ENOMEM;
 713                         goto err_out;
 714                 }
 715
 716                 ibdev_dbg(&dev->ibdev,
 717                           "qp->cpu_addr[0x%p] allocated: size[%lu], dma[%pad]\n",
 718                           qp->rq_cpu_addr, qp->rq_size, &qp->rq_dma_addr);
 719                 create_qp_params.rq_base_addr = qp->rq_dma_addr;
 720         }
 721
 722         err = efa_com_create_qp(&dev->edev, &create_qp_params,
 723                                 &create_qp_resp);
 724         if (err)
 725                 goto err_free_mapped;
 726
 727         resp.sq_db_offset = create_qp_resp.sq_db_offset;
 728         resp.rq_db_offset = create_qp_resp.rq_db_offset;
 729         resp.llq_desc_offset = create_qp_resp.llq_descriptors_offset;
 730         resp.send_sub_cq_idx = create_qp_resp.send_sub_cq_idx;
 731         resp.recv_sub_cq_idx = create_qp_resp.recv_sub_cq_idx;
 732
 733         err = qp_mmap_entries_setup(qp, dev, ucontext, &create_qp_params,
 734                                     &resp);
 735         if (err)
 736                 goto err_destroy_qp;
 737
 738         qp->qp_handle = create_qp_resp.qp_handle;
 739         qp->ibqp.qp_num = create_qp_resp.qp_num;
 740         qp->max_send_wr = init_attr->cap.max_send_wr;
 741         qp->max_recv_wr = init_attr->cap.max_recv_wr;
 742         qp->max_send_sge = init_attr->cap.max_send_sge;
 743         qp->max_recv_sge = init_attr->cap.max_recv_sge;
 744         qp->max_inline_data = init_attr->cap.max_inline_data;
 745
 746         if (udata->outlen) {
 747                 err = ib_copy_to_udata(udata, &resp,
 748                                        min(sizeof(resp), udata->outlen));
 749                 if (err) {
 750                         ibdev_dbg(&dev->ibdev,
 751                                   "Failed to copy udata for qp[%u]\n",
 752                                   create_qp_resp.qp_num);
 753                         goto err_remove_mmap_entries;
 754                 }
 755         }
 756
 757         ibdev_dbg(&dev->ibdev, "Created qp[%d]\n", qp->ibqp.qp_num);
 758
 759         return 0;
 760
 761 err_remove_mmap_entries:
 762         efa_qp_user_mmap_entries_remove(qp);
 763 err_destroy_qp:
 764         efa_destroy_qp_handle(dev, create_qp_resp.qp_handle);
 765 err_free_mapped:
 766         if (qp->rq_size)
 767                 efa_free_mapped(dev, qp->rq_cpu_addr, qp->rq_dma_addr,
 768                                 qp->rq_size, DMA_TO_DEVICE);
 769 err_out:
 770         atomic64_inc(&dev->stats.create_qp_err);
 771         return err;
 772 }
 773
 774 static const struct {
 775         int                     valid;
 776         enum ib_qp_attr_mask    req_param;
 777         enum ib_qp_attr_mask    opt_param;
 778 } srd_qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
 779         [IB_QPS_RESET] = {
 780                 [IB_QPS_RESET] = { .valid = 1 },
 781                 [IB_QPS_INIT]  = {
 782                         .valid = 1,
 783                         .req_param = IB_QP_PKEY_INDEX |
 784                                      IB_QP_PORT |
 785                                      IB_QP_QKEY,
 786                 },
 787         },
 788         [IB_QPS_INIT] = {
 789                 [IB_QPS_RESET] = { .valid = 1 },
 790                 [IB_QPS_ERR]   = { .valid = 1 },
 791                 [IB_QPS_INIT]  = {
 792                         .valid = 1,
 793                         .opt_param = IB_QP_PKEY_INDEX |
 794                                      IB_QP_PORT |
 795                                      IB_QP_QKEY,
 796                 },
 797                 [IB_QPS_RTR]   = {
 798                         .valid = 1,
 799                         .opt_param = IB_QP_PKEY_INDEX |
 800                                      IB_QP_QKEY,
 801                 },
 802         },
 803         [IB_QPS_RTR] = {
 804                 [IB_QPS_RESET] = { .valid = 1 },
 805                 [IB_QPS_ERR]   = { .valid = 1 },
 806                 [IB_QPS_RTS]   = {
 807                         .valid = 1,
 808                         .req_param = IB_QP_SQ_PSN,
 809                         .opt_param = IB_QP_CUR_STATE |
 810                                      IB_QP_QKEY |
 811                                      IB_QP_RNR_RETRY,
 812
 813                 }
 814         },
 815         [IB_QPS_RTS] = {
 816                 [IB_QPS_RESET] = { .valid = 1 },
 817                 [IB_QPS_ERR]   = { .valid = 1 },
 818                 [IB_QPS_RTS]   = {
 819                         .valid = 1,
 820                         .opt_param = IB_QP_CUR_STATE |
 821                                      IB_QP_QKEY,
 822                 },
 823                 [IB_QPS_SQD] = {
 824                         .valid = 1,
 825                         .opt_param = IB_QP_EN_SQD_ASYNC_NOTIFY,
 826                 },
 827         },
 828         [IB_QPS_SQD] = {
 829                 [IB_QPS_RESET] = { .valid = 1 },
 830                 [IB_QPS_ERR]   = { .valid = 1 },
 831                 [IB_QPS_RTS]   = {
 832                         .valid = 1,
 833                         .opt_param = IB_QP_CUR_STATE |
 834                                      IB_QP_QKEY,
 835                 },
 836                 [IB_QPS_SQD] = {
 837                         .valid = 1,
 838                         .opt_param = IB_QP_PKEY_INDEX |
 839                                      IB_QP_QKEY,
 840                 }
 841         },
 842         [IB_QPS_SQE] = {
 843                 [IB_QPS_RESET] = { .valid = 1 },
 844                 [IB_QPS_ERR]   = { .valid = 1 },
 845                 [IB_QPS_RTS]   = {
 846                         .valid = 1,
 847                         .opt_param = IB_QP_CUR_STATE |
 848                                      IB_QP_QKEY,
 849                 }
 850         },
 851         [IB_QPS_ERR] = {
 852                 [IB_QPS_RESET] = { .valid = 1 },
 853                 [IB_QPS_ERR]   = { .valid = 1 },
 854         }
 855 };
 856
 857 static bool efa_modify_srd_qp_is_ok(enum ib_qp_state cur_state,
 858                                     enum ib_qp_state next_state,
 859                                     enum ib_qp_attr_mask mask)
 860 {
 861         enum ib_qp_attr_mask req_param, opt_param;
 862
 863         if (mask & IB_QP_CUR_STATE  &&
 864             cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
 865             cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
 866                 return false;
 867
 868         if (!srd_qp_state_table[cur_state][next_state].valid)
 869                 return false;
 870
 871         req_param = srd_qp_state_table[cur_state][next_state].req_param;
 872         opt_param = srd_qp_state_table[cur_state][next_state].opt_param;
 873
 874         if ((mask & req_param) != req_param)
 875                 return false;
 876
 877         if (mask & ~(req_param | opt_param | IB_QP_STATE))
 878                 return false;
 879
 880         return true;
 881 }
 882
 883 static int efa_modify_qp_validate(struct efa_dev *dev, struct efa_qp *qp,
 884                                   struct ib_qp_attr *qp_attr, int qp_attr_mask,
 885                                   enum ib_qp_state cur_state,
 886                                   enum ib_qp_state new_state)
 887 {
 888         int err;
 889
 890 #define EFA_MODIFY_QP_SUPP_MASK \
 891         (IB_QP_STATE | IB_QP_CUR_STATE | IB_QP_EN_SQD_ASYNC_NOTIFY | \
 892          IB_QP_PKEY_INDEX | IB_QP_PORT | IB_QP_QKEY | IB_QP_SQ_PSN | \
 893          IB_QP_RNR_RETRY)
 894
 895         if (qp_attr_mask & ~EFA_MODIFY_QP_SUPP_MASK) {
 896                 ibdev_dbg(&dev->ibdev,
 897                           "Unsupported qp_attr_mask[%#x] supported[%#x]\n",
 898                           qp_attr_mask, EFA_MODIFY_QP_SUPP_MASK);
 899                 return -EOPNOTSUPP;
 900         }
 901
 902         if (qp->ibqp.qp_type == IB_QPT_DRIVER)
 903                 err = !efa_modify_srd_qp_is_ok(cur_state, new_state,
 904                                                qp_attr_mask);
 905         else
 906                 err = !ib_modify_qp_is_ok(cur_state, new_state, IB_QPT_UD,
 907                                           qp_attr_mask);
 908
 909         if (err) {
 910                 ibdev_dbg(&dev->ibdev, "Invalid modify QP parameters\n");
 911                 return -EINVAL;
 912         }
 913
 914         if ((qp_attr_mask & IB_QP_PORT) && qp_attr->port_num != 1) {
 915                 ibdev_dbg(&dev->ibdev, "Can't change port num\n");
 916                 return -EOPNOTSUPP;
 917         }
 918
 919         if ((qp_attr_mask & IB_QP_PKEY_INDEX) && qp_attr->pkey_index) {
 920                 ibdev_dbg(&dev->ibdev, "Can't change pkey index\n");
 921                 return -EOPNOTSUPP;
 922         }
 923
 924         return 0;
 925 }
 926
 927 int efa_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
 928                   int qp_attr_mask, struct ib_udata *udata)
 929 {
 930         struct efa_dev *dev = to_edev(ibqp->device);
 931         struct efa_com_modify_qp_params params = {};
 932         struct efa_qp *qp = to_eqp(ibqp);
 933         enum ib_qp_state cur_state;
 934         enum ib_qp_state new_state;
 935         int err;
 936
 937         if (qp_attr_mask & ~IB_QP_ATTR_STANDARD_BITS)
 938                 return -EOPNOTSUPP;
 939
 940         if (udata->inlen &&
 941             !ib_is_udata_cleared(udata, 0, udata->inlen)) {
 942                 ibdev_dbg(&dev->ibdev,
 943                           "Incompatible ABI params, udata not cleared\n");
 944                 return -EINVAL;
 945         }
 946
 947         cur_state = qp_attr_mask & IB_QP_CUR_STATE ? qp_attr->cur_qp_state :
 948                                                      qp->state;
 949         new_state = qp_attr_mask & IB_QP_STATE ? qp_attr->qp_state : cur_state;
 950
 951         err = efa_modify_qp_validate(dev, qp, qp_attr, qp_attr_mask, cur_state,
 952                                      new_state);
 953         if (err)
 954                 return err;
 955
 956         params.qp_handle = qp->qp_handle;
 957
 958         if (qp_attr_mask & IB_QP_STATE) {
 959                 EFA_SET(&params.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_QP_STATE,
 960                         1);
 961                 EFA_SET(&params.modify_mask,
 962                         EFA_ADMIN_MODIFY_QP_CMD_CUR_QP_STATE, 1);
 963                 params.cur_qp_state = cur_state;
 964                 params.qp_state = new_state;
 965         }
 966
 967         if (qp_attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) {
 968                 EFA_SET(&params.modify_mask,
 969                         EFA_ADMIN_MODIFY_QP_CMD_SQ_DRAINED_ASYNC_NOTIFY, 1);
 970                 params.sq_drained_async_notify = qp_attr->en_sqd_async_notify;
 971         }
 972
 973         if (qp_attr_mask & IB_QP_QKEY) {
 974                 EFA_SET(&params.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_QKEY, 1);
 975                 params.qkey = qp_attr->qkey;
 976         }
 977
 978         if (qp_attr_mask & IB_QP_SQ_PSN) {
 979                 EFA_SET(&params.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_SQ_PSN, 1);
 980                 params.sq_psn = qp_attr->sq_psn;
 981         }
 982
 983         if (qp_attr_mask & IB_QP_RNR_RETRY) {
 984                 EFA_SET(&params.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_RNR_RETRY,
 985                         1);
 986                 params.rnr_retry = qp_attr->rnr_retry;
 987         }
 988
 989         err = efa_com_modify_qp(&dev->edev, &params);
 990         if (err)
 991                 return err;
 992
 993         qp->state = new_state;
 994
 995         return 0;
 996 }
 997
 998 static int efa_destroy_cq_idx(struct efa_dev *dev, int cq_idx)
 999 {
1000         struct efa_com_destroy_cq_params params = { .cq_idx = cq_idx };
1001
1002         return efa_com_destroy_cq(&dev->edev, &params);
1003 }
1004
1005 static void efa_cq_user_mmap_entries_remove(struct efa_cq *cq)
1006 {
1007         rdma_user_mmap_entry_remove(cq->db_mmap_entry);
1008         rdma_user_mmap_entry_remove(cq->mmap_entry);
1009 }
1010
1011 int efa_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
1012 {
1013         struct efa_dev *dev = to_edev(ibcq->device);
1014         struct efa_cq *cq = to_ecq(ibcq);
1015
1016         ibdev_dbg(&dev->ibdev,
1017                   "Destroy cq[%d] virt[0x%p] freed: size[%lu], dma[%pad]\n",
1018                   cq->cq_idx, cq->cpu_addr, cq->size, &cq->dma_addr);
1019
1020         efa_destroy_cq_idx(dev, cq->cq_idx);
1021         efa_cq_user_mmap_entries_remove(cq);
1022         if (cq->eq) {
1023                 xa_erase(&dev->cqs_xa, cq->cq_idx);
1024                 synchronize_irq(cq->eq->irq.irqn);
1025         }
1026         efa_free_mapped(dev, cq->cpu_addr, cq->dma_addr, cq->size,
1027                         DMA_FROM_DEVICE);
1028         return 0;
1029 }
1030
1031 static struct efa_eq *efa_vec2eq(struct efa_dev *dev, int vec)
1032 {
1033         return &dev->eqs[vec];
1034 }
1035
1036 static int cq_mmap_entries_setup(struct efa_dev *dev, struct efa_cq *cq,
1037                                  struct efa_ibv_create_cq_resp *resp,
1038                                  bool db_valid)
1039 {
1040         resp->q_mmap_size = cq->size;
1041         cq->mmap_entry = efa_user_mmap_entry_insert(&cq->ucontext->ibucontext,
1042                                                     virt_to_phys(cq->cpu_addr),
1043                                                     cq->size, EFA_MMAP_DMA_PAGE,
1044                                                     &resp->q_mmap_key);
1045         if (!cq->mmap_entry)
1046                 return -ENOMEM;
1047
1048         if (db_valid) {
1049                 cq->db_mmap_entry =
1050                         efa_user_mmap_entry_insert(&cq->ucontext->ibucontext,
1051                                                    dev->db_bar_addr + resp->db_off,
1052                                                    PAGE_SIZE, EFA_MMAP_IO_NC,
1053                                                    &resp->db_mmap_key);
1054                 if (!cq->db_mmap_entry) {
1055                         rdma_user_mmap_entry_remove(cq->mmap_entry);
1056                         return -ENOMEM;
1057                 }
1058
1059                 resp->db_off &= ~PAGE_MASK;
1060                 resp->comp_mask |= EFA_CREATE_CQ_RESP_DB_OFF;
1061         }
1062
1063         return 0;
1064 }
1065
1066 int efa_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
1067                   struct ib_udata *udata)
1068 {
1069         struct efa_ucontext *ucontext = rdma_udata_to_drv_context(
1070                 udata, struct efa_ucontext, ibucontext);
1071         struct efa_com_create_cq_params params = {};
1072         struct efa_ibv_create_cq_resp resp = {};
1073         struct efa_com_create_cq_result result;
1074         struct ib_device *ibdev = ibcq->device;
1075         struct efa_dev *dev = to_edev(ibdev);
1076         struct efa_ibv_create_cq cmd = {};
1077         struct efa_cq *cq = to_ecq(ibcq);
1078         int entries = attr->cqe;
1079         bool set_src_addr;
1080         int err;
1081
1082         ibdev_dbg(ibdev, "create_cq entries %d\n", entries);
1083
1084         if (attr->flags)
1085                 return -EOPNOTSUPP;
1086
1087         if (entries < 1 || entries > dev->dev_attr.max_cq_depth) {
1088                 ibdev_dbg(ibdev,
1089                           "cq: requested entries[%u] non-positive or greater than max[%u]\n",
1090                           entries, dev->dev_attr.max_cq_depth);
1091                 err = -EINVAL;
1092                 goto err_out;
1093         }
1094
1095         if (offsetofend(typeof(cmd), num_sub_cqs) > udata->inlen) {
1096                 ibdev_dbg(ibdev,
1097                           "Incompatible ABI params, no input udata\n");
1098                 err = -EINVAL;
1099                 goto err_out;
1100         }
1101
1102         if (udata->inlen > sizeof(cmd) &&
1103             !ib_is_udata_cleared(udata, sizeof(cmd),
1104                                  udata->inlen - sizeof(cmd))) {
1105                 ibdev_dbg(ibdev,
1106                           "Incompatible ABI params, unknown fields in udata\n");
1107                 err = -EINVAL;
1108                 goto err_out;
1109         }
1110
1111         err = ib_copy_from_udata(&cmd, udata,
1112                                  min(sizeof(cmd), udata->inlen));
1113         if (err) {
1114                 ibdev_dbg(ibdev, "Cannot copy udata for create_cq\n");
1115                 goto err_out;
1116         }
1117
1118         if (cmd.comp_mask || !is_reserved_cleared(cmd.reserved_58)) {
1119                 ibdev_dbg(ibdev,
1120                           "Incompatible ABI params, unknown fields in udata\n");
1121                 err = -EINVAL;
1122                 goto err_out;
1123         }
1124
1125         set_src_addr = !!(cmd.flags & EFA_CREATE_CQ_WITH_SGID);
1126         if ((cmd.cq_entry_size != sizeof(struct efa_io_rx_cdesc_ex)) &&
1127             (set_src_addr ||
1128              cmd.cq_entry_size != sizeof(struct efa_io_rx_cdesc))) {
1129                 ibdev_dbg(ibdev,
1130                           "Invalid entry size [%u]\n", cmd.cq_entry_size);
1131                 err = -EINVAL;
1132                 goto err_out;
1133         }
1134
1135         if (cmd.num_sub_cqs != dev->dev_attr.sub_cqs_per_cq) {
1136                 ibdev_dbg(ibdev,
1137                           "Invalid number of sub cqs[%u] expected[%u]\n",
1138                           cmd.num_sub_cqs, dev->dev_attr.sub_cqs_per_cq);
1139                 err = -EINVAL;
1140                 goto err_out;
1141         }
1142
1143         cq->ucontext = ucontext;
1144         cq->size = PAGE_ALIGN(cmd.cq_entry_size * entries * cmd.num_sub_cqs);
1145         cq->cpu_addr = efa_zalloc_mapped(dev, &cq->dma_addr, cq->size,
1146                                          DMA_FROM_DEVICE);
1147         if (!cq->cpu_addr) {
1148                 err = -ENOMEM;
1149                 goto err_out;
1150         }
1151
1152         params.uarn = cq->ucontext->uarn;
1153         params.cq_depth = entries;
1154         params.dma_addr = cq->dma_addr;
1155         params.entry_size_in_bytes = cmd.cq_entry_size;
1156         params.num_sub_cqs = cmd.num_sub_cqs;
1157         params.set_src_addr = set_src_addr;
1158         if (cmd.flags & EFA_CREATE_CQ_WITH_COMPLETION_CHANNEL) {
1159                 cq->eq = efa_vec2eq(dev, attr->comp_vector);
1160                 params.eqn = cq->eq->eeq.eqn;
1161                 params.interrupt_mode_enabled = true;
1162         }
1163
1164         err = efa_com_create_cq(&dev->edev, &params, &result);
1165         if (err)
1166                 goto err_free_mapped;
1167
1168         resp.db_off = result.db_off;
1169         resp.cq_idx = result.cq_idx;
1170         cq->cq_idx = result.cq_idx;
1171         cq->ibcq.cqe = result.actual_depth;
1172         WARN_ON_ONCE(entries != result.actual_depth);
1173
1174         err = cq_mmap_entries_setup(dev, cq, &resp, result.db_valid);
1175         if (err) {
1176                 ibdev_dbg(ibdev, "Could not setup cq[%u] mmap entries\n",
1177                           cq->cq_idx);
1178                 goto err_destroy_cq;
1179         }
1180
1181         if (cq->eq) {
1182                 err = xa_err(xa_store(&dev->cqs_xa, cq->cq_idx, cq, GFP_KERNEL));
1183                 if (err) {
1184                         ibdev_dbg(ibdev, "Failed to store cq[%u] in xarray\n",
1185                                   cq->cq_idx);
1186                         goto err_remove_mmap;
1187                 }
1188         }
1189
1190         if (udata->outlen) {
1191                 err = ib_copy_to_udata(udata, &resp,
1192                                        min(sizeof(resp), udata->outlen));
1193                 if (err) {
1194                         ibdev_dbg(ibdev,
1195                                   "Failed to copy udata for create_cq\n");
1196                         goto err_xa_erase;
1197                 }
1198         }
1199
1200         ibdev_dbg(ibdev, "Created cq[%d], cq depth[%u]. dma[%pad] virt[0x%p]\n",
1201                   cq->cq_idx, result.actual_depth, &cq->dma_addr, cq->cpu_addr);
1202
1203         return 0;
1204
1205 err_xa_erase:
1206         if (cq->eq)
1207                 xa_erase(&dev->cqs_xa, cq->cq_idx);
1208 err_remove_mmap:
1209         efa_cq_user_mmap_entries_remove(cq);
1210 err_destroy_cq:
1211         efa_destroy_cq_idx(dev, cq->cq_idx);
1212 err_free_mapped:
1213         efa_free_mapped(dev, cq->cpu_addr, cq->dma_addr, cq->size,
1214                         DMA_FROM_DEVICE);
1215
1216 err_out:
1217         atomic64_inc(&dev->stats.create_cq_err);
1218         return err;
1219 }
1220
1221 static int umem_to_page_list(struct efa_dev *dev,
1222                              struct ib_umem *umem,
1223                              u64 *page_list,
1224                              u32 hp_cnt,
1225                              u8 hp_shift)
1226 {
1227         u32 pages_in_hp = BIT(hp_shift - PAGE_SHIFT);
1228         struct ib_block_iter biter;
1229         unsigned int hp_idx = 0;
1230
1231         ibdev_dbg(&dev->ibdev, "hp_cnt[%u], pages_in_hp[%u]\n",
1232                   hp_cnt, pages_in_hp);
1233
1234         rdma_umem_for_each_dma_block(umem, &biter, BIT(hp_shift))
1235                 page_list[hp_idx++] = rdma_block_iter_dma_address(&biter);
1236
1237         return 0;
1238 }
1239
1240 static struct scatterlist *efa_vmalloc_buf_to_sg(u64 *buf, int page_cnt)
1241 {
1242         struct scatterlist *sglist;
1243         struct page *pg;
1244         int i;
1245
1246         sglist = kmalloc_array(page_cnt, sizeof(*sglist), GFP_KERNEL);
1247         if (!sglist)
1248                 return NULL;
1249         sg_init_table(sglist, page_cnt);
1250         for (i = 0; i < page_cnt; i++) {
1251                 pg = vmalloc_to_page(buf);
1252                 if (!pg)
1253                         goto err;
1254                 sg_set_page(&sglist[i], pg, PAGE_SIZE, 0);
1255                 buf += PAGE_SIZE / sizeof(*buf);
1256         }
1257         return sglist;
1258
1259 err:
1260         kfree(sglist);
1261         return NULL;
1262 }
1263
1264 /*
1265  * create a chunk list of physical pages dma addresses from the supplied
1266  * scatter gather list
1267  */
1268 static int pbl_chunk_list_create(struct efa_dev *dev, struct pbl_context *pbl)
1269 {
1270         struct pbl_chunk_list *chunk_list = &pbl->phys.indirect.chunk_list;
1271         int page_cnt = pbl->phys.indirect.pbl_buf_size_in_pages;
1272         struct scatterlist *pages_sgl = pbl->phys.indirect.sgl;
1273         unsigned int chunk_list_size, chunk_idx, payload_idx;
1274         int sg_dma_cnt = pbl->phys.indirect.sg_dma_cnt;
1275         struct efa_com_ctrl_buff_info *ctrl_buf;
1276         u64 *cur_chunk_buf, *prev_chunk_buf;
1277         struct ib_block_iter biter;
1278         dma_addr_t dma_addr;
1279         int i;
1280
1281         /* allocate a chunk list that consists of 4KB chunks */
1282         chunk_list_size = DIV_ROUND_UP(page_cnt, EFA_PTRS_PER_CHUNK);
1283
1284         chunk_list->size = chunk_list_size;
1285         chunk_list->chunks = kcalloc(chunk_list_size,
1286                                      sizeof(*chunk_list->chunks),
1287                                      GFP_KERNEL);
1288         if (!chunk_list->chunks)
1289                 return -ENOMEM;
1290
1291         ibdev_dbg(&dev->ibdev,
1292                   "chunk_list_size[%u] - pages[%u]\n", chunk_list_size,
1293                   page_cnt);
1294
1295         /* allocate chunk buffers: */
1296         for (i = 0; i < chunk_list_size; i++) {
1297                 chunk_list->chunks[i].buf = kzalloc(EFA_CHUNK_SIZE, GFP_KERNEL);
1298                 if (!chunk_list->chunks[i].buf)
1299                         goto chunk_list_dealloc;
1300
1301                 chunk_list->chunks[i].length = EFA_CHUNK_USED_SIZE;
1302         }
1303         chunk_list->chunks[chunk_list_size - 1].length =
1304                 ((page_cnt % EFA_PTRS_PER_CHUNK) * EFA_CHUNK_PAYLOAD_PTR_SIZE) +
1305                         EFA_CHUNK_PTR_SIZE;
1306
1307         /* fill the dma addresses of sg list pages to chunks: */
1308         chunk_idx = 0;
1309         payload_idx = 0;
1310         cur_chunk_buf = chunk_list->chunks[0].buf;
1311         rdma_for_each_block(pages_sgl, &biter, sg_dma_cnt,
1312                             EFA_CHUNK_PAYLOAD_SIZE) {
1313                 cur_chunk_buf[payload_idx++] =
1314                         rdma_block_iter_dma_address(&biter);
1315
1316                 if (payload_idx == EFA_PTRS_PER_CHUNK) {
1317                         chunk_idx++;
1318                         cur_chunk_buf = chunk_list->chunks[chunk_idx].buf;
1319                         payload_idx = 0;
1320                 }
1321         }
1322
1323         /* map chunks to dma and fill chunks next ptrs */
1324         for (i = chunk_list_size - 1; i >= 0; i--) {
1325                 dma_addr = dma_map_single(&dev->pdev->dev,
1326                                           chunk_list->chunks[i].buf,
1327                                           chunk_list->chunks[i].length,
1328                                           DMA_TO_DEVICE);
1329                 if (dma_mapping_error(&dev->pdev->dev, dma_addr)) {
1330                         ibdev_err(&dev->ibdev,
1331                                   "chunk[%u] dma_map_failed\n", i);
1332                         goto chunk_list_unmap;
1333                 }
1334
1335                 chunk_list->chunks[i].dma_addr = dma_addr;
1336                 ibdev_dbg(&dev->ibdev,
1337                           "chunk[%u] mapped at [%pad]\n", i, &dma_addr);
1338
1339                 if (!i)
1340                         break;
1341
1342                 prev_chunk_buf = chunk_list->chunks[i - 1].buf;
1343
1344                 ctrl_buf = (struct efa_com_ctrl_buff_info *)
1345                                 &prev_chunk_buf[EFA_PTRS_PER_CHUNK];
1346                 ctrl_buf->length = chunk_list->chunks[i].length;
1347
1348                 efa_com_set_dma_addr(dma_addr,
1349                                      &ctrl_buf->address.mem_addr_high,
1350                                      &ctrl_buf->address.mem_addr_low);
1351         }
1352
1353         return 0;
1354
1355 chunk_list_unmap:
1356         for (; i < chunk_list_size; i++) {
1357                 dma_unmap_single(&dev->pdev->dev, chunk_list->chunks[i].dma_addr,
1358                                  chunk_list->chunks[i].length, DMA_TO_DEVICE);
1359         }
1360 chunk_list_dealloc:
1361         for (i = 0; i < chunk_list_size; i++)
1362                 kfree(chunk_list->chunks[i].buf);
1363
1364         kfree(chunk_list->chunks);
1365         return -ENOMEM;
1366 }
1367
1368 static void pbl_chunk_list_destroy(struct efa_dev *dev, struct pbl_context *pbl)
1369 {
1370         struct pbl_chunk_list *chunk_list = &pbl->phys.indirect.chunk_list;
1371         int i;
1372
1373         for (i = 0; i < chunk_list->size; i++) {
1374                 dma_unmap_single(&dev->pdev->dev, chunk_list->chunks[i].dma_addr,
1375                                  chunk_list->chunks[i].length, DMA_TO_DEVICE);
1376                 kfree(chunk_list->chunks[i].buf);
1377         }
1378
1379         kfree(chunk_list->chunks);
1380 }
1381
1382 /* initialize pbl continuous mode: map pbl buffer to a dma address. */
1383 static int pbl_continuous_initialize(struct efa_dev *dev,
1384                                      struct pbl_context *pbl)
1385 {
1386         dma_addr_t dma_addr;
1387
1388         dma_addr = dma_map_single(&dev->pdev->dev, pbl->pbl_buf,
1389                                   pbl->pbl_buf_size_in_bytes, DMA_TO_DEVICE);
1390         if (dma_mapping_error(&dev->pdev->dev, dma_addr)) {
1391                 ibdev_err(&dev->ibdev, "Unable to map pbl to DMA address\n");
1392                 return -ENOMEM;
1393         }
1394
1395         pbl->phys.continuous.dma_addr = dma_addr;
1396         ibdev_dbg(&dev->ibdev,
1397                   "pbl continuous - dma_addr = %pad, size[%u]\n",
1398                   &dma_addr, pbl->pbl_buf_size_in_bytes);
1399
1400         return 0;
1401 }
1402
1403 /*
1404  * initialize pbl indirect mode:
1405  * create a chunk list out of the dma addresses of the physical pages of
1406  * pbl buffer.
1407  */
1408 static int pbl_indirect_initialize(struct efa_dev *dev, struct pbl_context *pbl)
1409 {
1410         u32 size_in_pages = DIV_ROUND_UP(pbl->pbl_buf_size_in_bytes, EFA_CHUNK_PAYLOAD_SIZE);
1411         struct scatterlist *sgl;
1412         int sg_dma_cnt, err;
1413
1414         BUILD_BUG_ON(EFA_CHUNK_PAYLOAD_SIZE > PAGE_SIZE);
1415         sgl = efa_vmalloc_buf_to_sg(pbl->pbl_buf, size_in_pages);
1416         if (!sgl)
1417                 return -ENOMEM;
1418
1419         sg_dma_cnt = dma_map_sg(&dev->pdev->dev, sgl, size_in_pages, DMA_TO_DEVICE);
1420         if (!sg_dma_cnt) {
1421                 err = -EINVAL;
1422                 goto err_map;
1423         }
1424
1425         pbl->phys.indirect.pbl_buf_size_in_pages = size_in_pages;
1426         pbl->phys.indirect.sgl = sgl;
1427         pbl->phys.indirect.sg_dma_cnt = sg_dma_cnt;
1428         err = pbl_chunk_list_create(dev, pbl);
1429         if (err) {
1430                 ibdev_dbg(&dev->ibdev,
1431                           "chunk_list creation failed[%d]\n", err);
1432                 goto err_chunk;
1433         }
1434
1435         ibdev_dbg(&dev->ibdev,
1436                   "pbl indirect - size[%u], chunks[%u]\n",
1437                   pbl->pbl_buf_size_in_bytes,
1438                   pbl->phys.indirect.chunk_list.size);
1439
1440         return 0;
1441
1442 err_chunk:
1443         dma_unmap_sg(&dev->pdev->dev, sgl, size_in_pages, DMA_TO_DEVICE);
1444 err_map:
1445         kfree(sgl);
1446         return err;
1447 }
1448
1449 static void pbl_indirect_terminate(struct efa_dev *dev, struct pbl_context *pbl)
1450 {
1451         pbl_chunk_list_destroy(dev, pbl);
1452         dma_unmap_sg(&dev->pdev->dev, pbl->phys.indirect.sgl,
1453                      pbl->phys.indirect.pbl_buf_size_in_pages, DMA_TO_DEVICE);
1454         kfree(pbl->phys.indirect.sgl);
1455 }
1456
1457 /* create a page buffer list from a mapped user memory region */
1458 static int pbl_create(struct efa_dev *dev,
1459                       struct pbl_context *pbl,
1460                       struct ib_umem *umem,
1461                       int hp_cnt,
1462                       u8 hp_shift)
1463 {
1464         int err;
1465
1466         pbl->pbl_buf_size_in_bytes = hp_cnt * EFA_CHUNK_PAYLOAD_PTR_SIZE;
1467         pbl->pbl_buf = kvzalloc(pbl->pbl_buf_size_in_bytes, GFP_KERNEL);
1468         if (!pbl->pbl_buf)
1469                 return -ENOMEM;
1470
1471         if (is_vmalloc_addr(pbl->pbl_buf)) {
1472                 pbl->physically_continuous = 0;
1473                 err = umem_to_page_list(dev, umem, pbl->pbl_buf, hp_cnt,
1474                                         hp_shift);
1475                 if (err)
1476                         goto err_free;
1477
1478                 err = pbl_indirect_initialize(dev, pbl);
1479                 if (err)
1480                         goto err_free;
1481         } else {
1482                 pbl->physically_continuous = 1;
1483                 err = umem_to_page_list(dev, umem, pbl->pbl_buf, hp_cnt,
1484                                         hp_shift);
1485                 if (err)
1486                         goto err_free;
1487
1488                 err = pbl_continuous_initialize(dev, pbl);
1489                 if (err)
1490                         goto err_free;
1491         }
1492
1493         ibdev_dbg(&dev->ibdev,
1494                   "user_pbl_created: user_pages[%u], continuous[%u]\n",
1495                   hp_cnt, pbl->physically_continuous);
1496
1497         return 0;
1498
1499 err_free:
1500         kvfree(pbl->pbl_buf);
1501         return err;
1502 }
1503
1504 static void pbl_destroy(struct efa_dev *dev, struct pbl_context *pbl)
1505 {
1506         if (pbl->physically_continuous)
1507                 dma_unmap_single(&dev->pdev->dev, pbl->phys.continuous.dma_addr,
1508                                  pbl->pbl_buf_size_in_bytes, DMA_TO_DEVICE);
1509         else
1510                 pbl_indirect_terminate(dev, pbl);
1511
1512         kvfree(pbl->pbl_buf);
1513 }
1514
1515 static int efa_create_inline_pbl(struct efa_dev *dev, struct efa_mr *mr,
1516                                  struct efa_com_reg_mr_params *params)
1517 {
1518         int err;
1519
1520         params->inline_pbl = 1;
1521         err = umem_to_page_list(dev, mr->umem, params->pbl.inline_pbl_array,
1522                                 params->page_num, params->page_shift);
1523         if (err)
1524                 return err;
1525
1526         ibdev_dbg(&dev->ibdev,
1527                   "inline_pbl_array - pages[%u]\n", params->page_num);
1528
1529         return 0;
1530 }
1531
1532 static int efa_create_pbl(struct efa_dev *dev,
1533                           struct pbl_context *pbl,
1534                           struct efa_mr *mr,
1535                           struct efa_com_reg_mr_params *params)
1536 {
1537         int err;
1538
1539         err = pbl_create(dev, pbl, mr->umem, params->page_num,
1540                          params->page_shift);
1541         if (err) {
1542                 ibdev_dbg(&dev->ibdev, "Failed to create pbl[%d]\n", err);
1543                 return err;
1544         }
1545
1546         params->inline_pbl = 0;
1547         params->indirect = !pbl->physically_continuous;
1548         if (pbl->physically_continuous) {
1549                 params->pbl.pbl.length = pbl->pbl_buf_size_in_bytes;
1550
1551                 efa_com_set_dma_addr(pbl->phys.continuous.dma_addr,
1552                                      &params->pbl.pbl.address.mem_addr_high,
1553                                      &params->pbl.pbl.address.mem_addr_low);
1554         } else {
1555                 params->pbl.pbl.length =
1556                         pbl->phys.indirect.chunk_list.chunks[0].length;
1557
1558                 efa_com_set_dma_addr(pbl->phys.indirect.chunk_list.chunks[0].dma_addr,
1559                                      &params->pbl.pbl.address.mem_addr_high,
1560                                      &params->pbl.pbl.address.mem_addr_low);
1561         }
1562
1563         return 0;
1564 }
1565
1566 static struct efa_mr *efa_alloc_mr(struct ib_pd *ibpd, int access_flags,
1567                                    struct ib_udata *udata)
1568 {
1569         struct efa_dev *dev = to_edev(ibpd->device);
1570         int supp_access_flags;
1571         struct efa_mr *mr;
1572
1573         if (udata && udata->inlen &&
1574             !ib_is_udata_cleared(udata, 0, sizeof(udata->inlen))) {
1575                 ibdev_dbg(&dev->ibdev,
1576                           "Incompatible ABI params, udata not cleared\n");
1577                 return ERR_PTR(-EINVAL);
1578         }
1579
1580         supp_access_flags =
1581                 IB_ACCESS_LOCAL_WRITE |
1582                 (EFA_DEV_CAP(dev, RDMA_READ) ? IB_ACCESS_REMOTE_READ : 0) |
1583                 (EFA_DEV_CAP(dev, RDMA_WRITE) ? IB_ACCESS_REMOTE_WRITE : 0);
1584
1585         access_flags &= ~IB_ACCESS_OPTIONAL;
1586         if (access_flags & ~supp_access_flags) {
1587                 ibdev_dbg(&dev->ibdev,
1588                           "Unsupported access flags[%#x], supported[%#x]\n",
1589                           access_flags, supp_access_flags);
1590                 return ERR_PTR(-EOPNOTSUPP);
1591         }
1592
1593         mr = kzalloc(sizeof(*mr), GFP_KERNEL);
1594         if (!mr)
1595                 return ERR_PTR(-ENOMEM);
1596
1597         return mr;
1598 }
1599
1600 static int efa_register_mr(struct ib_pd *ibpd, struct efa_mr *mr, u64 start,
1601                            u64 length, u64 virt_addr, int access_flags)
1602 {
1603         struct efa_dev *dev = to_edev(ibpd->device);
1604         struct efa_com_reg_mr_params params = {};
1605         struct efa_com_reg_mr_result result = {};
1606         struct pbl_context pbl;
1607         unsigned int pg_sz;
1608         int inline_size;
1609         int err;
1610
1611         params.pd = to_epd(ibpd)->pdn;
1612         params.iova = virt_addr;
1613         params.mr_length_in_bytes = length;
1614         params.permissions = access_flags;
1615
1616         pg_sz = ib_umem_find_best_pgsz(mr->umem,
1617                                        dev->dev_attr.page_size_cap,
1618                                        virt_addr);
1619         if (!pg_sz) {
1620                 ibdev_dbg(&dev->ibdev, "Failed to find a suitable page size in page_size_cap %#llx\n",
1621                           dev->dev_attr.page_size_cap);
1622                 return -EOPNOTSUPP;
1623         }
1624
1625         params.page_shift = order_base_2(pg_sz);
1626         params.page_num = ib_umem_num_dma_blocks(mr->umem, pg_sz);
1627
1628         ibdev_dbg(&dev->ibdev,
1629                   "start %#llx length %#llx params.page_shift %u params.page_num %u\n",
1630                   start, length, params.page_shift, params.page_num);
1631
1632         inline_size = ARRAY_SIZE(params.pbl.inline_pbl_array);
1633         if (params.page_num <= inline_size) {
1634                 err = efa_create_inline_pbl(dev, mr, &params);
1635                 if (err)
1636                         return err;
1637
1638                 err = efa_com_register_mr(&dev->edev, &params, &result);
1639                 if (err)
1640                         return err;
1641         } else {
1642                 err = efa_create_pbl(dev, &pbl, mr, &params);
1643                 if (err)
1644                         return err;
1645
1646                 err = efa_com_register_mr(&dev->edev, &params, &result);
1647                 pbl_destroy(dev, &pbl);
1648
1649                 if (err)
1650                         return err;
1651         }
1652
1653         mr->ibmr.lkey = result.l_key;
1654         mr->ibmr.rkey = result.r_key;
1655         mr->ibmr.length = length;
1656         ibdev_dbg(&dev->ibdev, "Registered mr[%d]\n", mr->ibmr.lkey);
1657
1658         return 0;
1659 }
1660
1661 struct ib_mr *efa_reg_user_mr_dmabuf(struct ib_pd *ibpd, u64 start,
1662                                      u64 length, u64 virt_addr,
1663                                      int fd, int access_flags,
1664                                      struct ib_udata *udata)
1665 {
1666         struct efa_dev *dev = to_edev(ibpd->device);
1667         struct ib_umem_dmabuf *umem_dmabuf;
1668         struct efa_mr *mr;
1669         int err;
1670
1671         mr = efa_alloc_mr(ibpd, access_flags, udata);
1672         if (IS_ERR(mr)) {
1673                 err = PTR_ERR(mr);
1674                 goto err_out;
1675         }
1676
1677         umem_dmabuf = ib_umem_dmabuf_get_pinned(ibpd->device, start, length, fd,
1678                                                 access_flags);
1679         if (IS_ERR(umem_dmabuf)) {
1680                 err = PTR_ERR(umem_dmabuf);
1681                 ibdev_dbg(&dev->ibdev, "Failed to get dmabuf umem[%d]\n", err);
1682                 goto err_free;
1683         }
1684
1685         mr->umem = &umem_dmabuf->umem;
1686         err = efa_register_mr(ibpd, mr, start, length, virt_addr, access_flags);
1687         if (err)
1688                 goto err_release;
1689
1690         return &mr->ibmr;
1691
1692 err_release:
1693         ib_umem_release(mr->umem);
1694 err_free:
1695         kfree(mr);
1696 err_out:
1697         atomic64_inc(&dev->stats.reg_mr_err);
1698         return ERR_PTR(err);
1699 }
1700
1701 struct ib_mr *efa_reg_mr(struct ib_pd *ibpd, u64 start, u64 length,
1702                          u64 virt_addr, int access_flags,
1703                          struct ib_udata *udata)
1704 {
1705         struct efa_dev *dev = to_edev(ibpd->device);
1706         struct efa_mr *mr;
1707         int err;
1708
1709         mr = efa_alloc_mr(ibpd, access_flags, udata);
1710         if (IS_ERR(mr)) {
1711                 err = PTR_ERR(mr);
1712                 goto err_out;
1713         }
1714
1715         mr->umem = ib_umem_get(ibpd->device, start, length, access_flags);
1716         if (IS_ERR(mr->umem)) {
1717                 err = PTR_ERR(mr->umem);
1718                 ibdev_dbg(&dev->ibdev,
1719                           "Failed to pin and map user space memory[%d]\n", err);
1720                 goto err_free;
1721         }
1722
1723         err = efa_register_mr(ibpd, mr, start, length, virt_addr, access_flags);
1724         if (err)
1725                 goto err_release;
1726
1727         return &mr->ibmr;
1728
1729 err_release:
1730         ib_umem_release(mr->umem);
1731 err_free:
1732         kfree(mr);
1733 err_out:
1734         atomic64_inc(&dev->stats.reg_mr_err);
1735         return ERR_PTR(err);
1736 }
1737
1738 int efa_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
1739 {
1740         struct efa_dev *dev = to_edev(ibmr->device);
1741         struct efa_com_dereg_mr_params params;
1742         struct efa_mr *mr = to_emr(ibmr);
1743         int err;
1744
1745         ibdev_dbg(&dev->ibdev, "Deregister mr[%d]\n", ibmr->lkey);
1746
1747         params.l_key = mr->ibmr.lkey;
1748         err = efa_com_dereg_mr(&dev->edev, &params);
1749         if (err)
1750                 return err;
1751
1752         ib_umem_release(mr->umem);
1753         kfree(mr);
1754
1755         return 0;
1756 }
1757
1758 int efa_get_port_immutable(struct ib_device *ibdev, u32 port_num,
1759                            struct ib_port_immutable *immutable)
1760 {
1761         struct ib_port_attr attr;
1762         int err;
1763
1764         err = ib_query_port(ibdev, port_num, &attr);
1765         if (err) {
1766                 ibdev_dbg(ibdev, "Couldn't query port err[%d]\n", err);
1767                 return err;
1768         }
1769
1770         immutable->pkey_tbl_len = attr.pkey_tbl_len;
1771         immutable->gid_tbl_len = attr.gid_tbl_len;
1772
1773         return 0;
1774 }
1775
1776 static int efa_dealloc_uar(struct efa_dev *dev, u16 uarn)
1777 {
1778         struct efa_com_dealloc_uar_params params = {
1779                 .uarn = uarn,
1780         };
1781
1782         return efa_com_dealloc_uar(&dev->edev, &params);
1783 }
1784
1785 #define EFA_CHECK_USER_COMP(_dev, _comp_mask, _attr, _mask, _attr_str) \
1786         (_attr_str = (!(_dev)->dev_attr._attr || ((_comp_mask) & (_mask))) ? \
1787                      NULL : #_attr)
1788
1789 static int efa_user_comp_handshake(const struct ib_ucontext *ibucontext,
1790                                    const struct efa_ibv_alloc_ucontext_cmd *cmd)
1791 {
1792         struct efa_dev *dev = to_edev(ibucontext->device);
1793         char *attr_str;
1794
1795         if (EFA_CHECK_USER_COMP(dev, cmd->comp_mask, max_tx_batch,
1796                                 EFA_ALLOC_UCONTEXT_CMD_COMP_TX_BATCH, attr_str))
1797                 goto err;
1798
1799         if (EFA_CHECK_USER_COMP(dev, cmd->comp_mask, min_sq_depth,
1800                                 EFA_ALLOC_UCONTEXT_CMD_COMP_MIN_SQ_WR,
1801                                 attr_str))
1802                 goto err;
1803
1804         return 0;
1805
1806 err:
1807         ibdev_dbg(&dev->ibdev, "Userspace handshake failed for %s attribute\n",
1808                   attr_str);
1809         return -EOPNOTSUPP;
1810 }
1811
1812 int efa_alloc_ucontext(struct ib_ucontext *ibucontext, struct ib_udata *udata)
1813 {
1814         struct efa_ucontext *ucontext = to_eucontext(ibucontext);
1815         struct efa_dev *dev = to_edev(ibucontext->device);
1816         struct efa_ibv_alloc_ucontext_resp resp = {};
1817         struct efa_ibv_alloc_ucontext_cmd cmd = {};
1818         struct efa_com_alloc_uar_result result;
1819         int err;
1820
1821         /*
1822          * it's fine if the driver does not know all request fields,
1823          * we will ack input fields in our response.
1824          */
1825
1826         err = ib_copy_from_udata(&cmd, udata,
1827                                  min(sizeof(cmd), udata->inlen));
1828         if (err) {
1829                 ibdev_dbg(&dev->ibdev,
1830                           "Cannot copy udata for alloc_ucontext\n");
1831                 goto err_out;
1832         }
1833
1834         err = efa_user_comp_handshake(ibucontext, &cmd);
1835         if (err)
1836                 goto err_out;
1837
1838         err = efa_com_alloc_uar(&dev->edev, &result);
1839         if (err)
1840                 goto err_out;
1841
1842         ucontext->uarn = result.uarn;
1843
1844         resp.cmds_supp_udata_mask |= EFA_USER_CMDS_SUPP_UDATA_QUERY_DEVICE;
1845         resp.cmds_supp_udata_mask |= EFA_USER_CMDS_SUPP_UDATA_CREATE_AH;
1846         resp.sub_cqs_per_cq = dev->dev_attr.sub_cqs_per_cq;
1847         resp.inline_buf_size = dev->dev_attr.inline_buf_size;
1848         resp.max_llq_size = dev->dev_attr.max_llq_size;
1849         resp.max_tx_batch = dev->dev_attr.max_tx_batch;
1850         resp.min_sq_wr = dev->dev_attr.min_sq_depth;
1851
1852         err = ib_copy_to_udata(udata, &resp,
1853                                min(sizeof(resp), udata->outlen));
1854         if (err)
1855                 goto err_dealloc_uar;
1856
1857         return 0;
1858
1859 err_dealloc_uar:
1860         efa_dealloc_uar(dev, result.uarn);
1861 err_out:
1862         atomic64_inc(&dev->stats.alloc_ucontext_err);
1863         return err;
1864 }
1865
1866 void efa_dealloc_ucontext(struct ib_ucontext *ibucontext)
1867 {
1868         struct efa_ucontext *ucontext = to_eucontext(ibucontext);
1869         struct efa_dev *dev = to_edev(ibucontext->device);
1870
1871         efa_dealloc_uar(dev, ucontext->uarn);
1872 }
1873
1874 void efa_mmap_free(struct rdma_user_mmap_entry *rdma_entry)
1875 {
1876         struct efa_user_mmap_entry *entry = to_emmap(rdma_entry);
1877
1878         kfree(entry);
1879 }
1880
1881 static int __efa_mmap(struct efa_dev *dev, struct efa_ucontext *ucontext,
1882                       struct vm_area_struct *vma)
1883 {
1884         struct rdma_user_mmap_entry *rdma_entry;
1885         struct efa_user_mmap_entry *entry;
1886         unsigned long va;
1887         int err = 0;
1888         u64 pfn;
1889
1890         rdma_entry = rdma_user_mmap_entry_get(&ucontext->ibucontext, vma);
1891         if (!rdma_entry) {
1892                 ibdev_dbg(&dev->ibdev,
1893                           "pgoff[%#lx] does not have valid entry\n",
1894                           vma->vm_pgoff);
1895                 atomic64_inc(&dev->stats.mmap_err);
1896                 return -EINVAL;
1897         }
1898         entry = to_emmap(rdma_entry);
1899
1900         ibdev_dbg(&dev->ibdev,
1901                   "Mapping address[%#llx], length[%#zx], mmap_flag[%d]\n",
1902                   entry->address, rdma_entry->npages * PAGE_SIZE,
1903                   entry->mmap_flag);
1904
1905         pfn = entry->address >> PAGE_SHIFT;
1906         switch (entry->mmap_flag) {
1907         case EFA_MMAP_IO_NC:
1908                 err = rdma_user_mmap_io(&ucontext->ibucontext, vma, pfn,
1909                                         entry->rdma_entry.npages * PAGE_SIZE,
1910                                         pgprot_noncached(vma->vm_page_prot),
1911                                         rdma_entry);
1912                 break;
1913         case EFA_MMAP_IO_WC:
1914                 err = rdma_user_mmap_io(&ucontext->ibucontext, vma, pfn,
1915                                         entry->rdma_entry.npages * PAGE_SIZE,
1916                                         pgprot_writecombine(vma->vm_page_prot),
1917                                         rdma_entry);
1918                 break;
1919         case EFA_MMAP_DMA_PAGE:
1920                 for (va = vma->vm_start; va < vma->vm_end;
1921                      va += PAGE_SIZE, pfn++) {
1922                         err = vm_insert_page(vma, va, pfn_to_page(pfn));
1923                         if (err)
1924                                 break;
1925                 }
1926                 break;
1927         default:
1928                 err = -EINVAL;
1929         }
1930
1931         if (err) {
1932                 ibdev_dbg(
1933                         &dev->ibdev,
1934                         "Couldn't mmap address[%#llx] length[%#zx] mmap_flag[%d] err[%d]\n",
1935                         entry->address, rdma_entry->npages * PAGE_SIZE,
1936                         entry->mmap_flag, err);
1937                 atomic64_inc(&dev->stats.mmap_err);
1938         }
1939
1940         rdma_user_mmap_entry_put(rdma_entry);
1941         return err;
1942 }
1943
1944 int efa_mmap(struct ib_ucontext *ibucontext,
1945              struct vm_area_struct *vma)
1946 {
1947         struct efa_ucontext *ucontext = to_eucontext(ibucontext);
1948         struct efa_dev *dev = to_edev(ibucontext->device);
1949         size_t length = vma->vm_end - vma->vm_start;
1950
1951         ibdev_dbg(&dev->ibdev,
1952                   "start %#lx, end %#lx, length = %#zx, pgoff = %#lx\n",
1953                   vma->vm_start, vma->vm_end, length, vma->vm_pgoff);
1954
1955         return __efa_mmap(dev, ucontext, vma);
1956 }
1957
1958 static int efa_ah_destroy(struct efa_dev *dev, struct efa_ah *ah)
1959 {
1960         struct efa_com_destroy_ah_params params = {
1961                 .ah = ah->ah,
1962                 .pdn = to_epd(ah->ibah.pd)->pdn,
1963         };
1964
1965         return efa_com_destroy_ah(&dev->edev, &params);
1966 }
1967
1968 int efa_create_ah(struct ib_ah *ibah,
1969                   struct rdma_ah_init_attr *init_attr,
1970                   struct ib_udata *udata)
1971 {
1972         struct rdma_ah_attr *ah_attr = init_attr->ah_attr;
1973         struct efa_dev *dev = to_edev(ibah->device);
1974         struct efa_com_create_ah_params params = {};
1975         struct efa_ibv_create_ah_resp resp = {};
1976         struct efa_com_create_ah_result result;
1977         struct efa_ah *ah = to_eah(ibah);
1978         int err;
1979
1980         if (!(init_attr->flags & RDMA_CREATE_AH_SLEEPABLE)) {
1981                 ibdev_dbg(&dev->ibdev,
1982                           "Create address handle is not supported in atomic context\n");
1983                 err = -EOPNOTSUPP;
1984                 goto err_out;
1985         }
1986
1987         if (udata->inlen &&
1988             !ib_is_udata_cleared(udata, 0, udata->inlen)) {
1989                 ibdev_dbg(&dev->ibdev, "Incompatible ABI params\n");
1990                 err = -EINVAL;
1991                 goto err_out;
1992         }
1993
1994         memcpy(params.dest_addr, ah_attr->grh.dgid.raw,
1995                sizeof(params.dest_addr));
1996         params.pdn = to_epd(ibah->pd)->pdn;
1997         err = efa_com_create_ah(&dev->edev, &params, &result);
1998         if (err)
1999                 goto err_out;
2000
2001         memcpy(ah->id, ah_attr->grh.dgid.raw, sizeof(ah->id));
2002         ah->ah = result.ah;
2003
2004         resp.efa_address_handle = result.ah;
2005
2006         if (udata->outlen) {
2007                 err = ib_copy_to_udata(udata, &resp,
2008                                        min(sizeof(resp), udata->outlen));
2009                 if (err) {
2010                         ibdev_dbg(&dev->ibdev,
2011                                   "Failed to copy udata for create_ah response\n");
2012                         goto err_destroy_ah;
2013                 }
2014         }
2015         ibdev_dbg(&dev->ibdev, "Created ah[%d]\n", ah->ah);
2016
2017         return 0;
2018
2019 err_destroy_ah:
2020         efa_ah_destroy(dev, ah);
2021 err_out:
2022         atomic64_inc(&dev->stats.create_ah_err);
2023         return err;
2024 }
2025
2026 int efa_destroy_ah(struct ib_ah *ibah, u32 flags)
2027 {
2028         struct efa_dev *dev = to_edev(ibah->pd->device);
2029         struct efa_ah *ah = to_eah(ibah);
2030
2031         ibdev_dbg(&dev->ibdev, "Destroy ah[%d]\n", ah->ah);
2032
2033         if (!(flags & RDMA_DESTROY_AH_SLEEPABLE)) {
2034                 ibdev_dbg(&dev->ibdev,
2035                           "Destroy address handle is not supported in atomic context\n");
2036                 return -EOPNOTSUPP;
2037         }
2038
2039         efa_ah_destroy(dev, ah);
2040         return 0;
2041 }
2042
2043 struct rdma_hw_stats *efa_alloc_hw_port_stats(struct ib_device *ibdev,
2044                                               u32 port_num)
2045 {
2046         return rdma_alloc_hw_stats_struct(efa_port_stats_descs,
2047                                           ARRAY_SIZE(efa_port_stats_descs),
2048                                           RDMA_HW_STATS_DEFAULT_LIFESPAN);
2049 }
2050
2051 struct rdma_hw_stats *efa_alloc_hw_device_stats(struct ib_device *ibdev)
2052 {
2053         return rdma_alloc_hw_stats_struct(efa_device_stats_descs,
2054                                           ARRAY_SIZE(efa_device_stats_descs),
2055                                           RDMA_HW_STATS_DEFAULT_LIFESPAN);
2056 }
2057
2058 static int efa_fill_device_stats(struct efa_dev *dev,
2059                                  struct rdma_hw_stats *stats)
2060 {
2061         struct efa_com_stats_admin *as = &dev->edev.aq.stats;
2062         struct efa_stats *s = &dev->stats;
2063
2064         stats->value[EFA_SUBMITTED_CMDS] = atomic64_read(&as->submitted_cmd);
2065         stats->value[EFA_COMPLETED_CMDS] = atomic64_read(&as->completed_cmd);
2066         stats->value[EFA_CMDS_ERR] = atomic64_read(&as->cmd_err);
2067         stats->value[EFA_NO_COMPLETION_CMDS] = atomic64_read(&as->no_completion);
2068
2069         stats->value[EFA_KEEP_ALIVE_RCVD] = atomic64_read(&s->keep_alive_rcvd);
2070         stats->value[EFA_ALLOC_PD_ERR] = atomic64_read(&s->alloc_pd_err);
2071         stats->value[EFA_CREATE_QP_ERR] = atomic64_read(&s->create_qp_err);
2072         stats->value[EFA_CREATE_CQ_ERR] = atomic64_read(&s->create_cq_err);
2073         stats->value[EFA_REG_MR_ERR] = atomic64_read(&s->reg_mr_err);
2074         stats->value[EFA_ALLOC_UCONTEXT_ERR] =
2075                 atomic64_read(&s->alloc_ucontext_err);
2076         stats->value[EFA_CREATE_AH_ERR] = atomic64_read(&s->create_ah_err);
2077         stats->value[EFA_MMAP_ERR] = atomic64_read(&s->mmap_err);
2078
2079         return ARRAY_SIZE(efa_device_stats_descs);
2080 }
2081
2082 static int efa_fill_port_stats(struct efa_dev *dev, struct rdma_hw_stats *stats,
2083                                u32 port_num)
2084 {
2085         struct efa_com_get_stats_params params = {};
2086         union efa_com_get_stats_result result;
2087         struct efa_com_rdma_write_stats *rws;
2088         struct efa_com_rdma_read_stats *rrs;
2089         struct efa_com_messages_stats *ms;
2090         struct efa_com_basic_stats *bs;
2091         int err;
2092
2093         params.scope = EFA_ADMIN_GET_STATS_SCOPE_ALL;
2094         params.type = EFA_ADMIN_GET_STATS_TYPE_BASIC;
2095
2096         err = efa_com_get_stats(&dev->edev, &params, &result);
2097         if (err)
2098                 return err;
2099
2100         bs = &result.basic_stats;
2101         stats->value[EFA_TX_BYTES] = bs->tx_bytes;
2102         stats->value[EFA_TX_PKTS] = bs->tx_pkts;
2103         stats->value[EFA_RX_BYTES] = bs->rx_bytes;
2104         stats->value[EFA_RX_PKTS] = bs->rx_pkts;
2105         stats->value[EFA_RX_DROPS] = bs->rx_drops;
2106
2107         params.type = EFA_ADMIN_GET_STATS_TYPE_MESSAGES;
2108         err = efa_com_get_stats(&dev->edev, &params, &result);
2109         if (err)
2110                 return err;
2111
2112         ms = &result.messages_stats;
2113         stats->value[EFA_SEND_BYTES] = ms->send_bytes;
2114         stats->value[EFA_SEND_WRS] = ms->send_wrs;
2115         stats->value[EFA_RECV_BYTES] = ms->recv_bytes;
2116         stats->value[EFA_RECV_WRS] = ms->recv_wrs;
2117
2118         params.type = EFA_ADMIN_GET_STATS_TYPE_RDMA_READ;
2119         err = efa_com_get_stats(&dev->edev, &params, &result);
2120         if (err)
2121                 return err;
2122
2123         rrs = &result.rdma_read_stats;
2124         stats->value[EFA_RDMA_READ_WRS] = rrs->read_wrs;
2125         stats->value[EFA_RDMA_READ_BYTES] = rrs->read_bytes;
2126         stats->value[EFA_RDMA_READ_WR_ERR] = rrs->read_wr_err;
2127         stats->value[EFA_RDMA_READ_RESP_BYTES] = rrs->read_resp_bytes;
2128
2129         if (EFA_DEV_CAP(dev, RDMA_WRITE)) {
2130                 params.type = EFA_ADMIN_GET_STATS_TYPE_RDMA_WRITE;
2131                 err = efa_com_get_stats(&dev->edev, &params, &result);
2132                 if (err)
2133                         return err;
2134
2135                 rws = &result.rdma_write_stats;
2136                 stats->value[EFA_RDMA_WRITE_WRS] = rws->write_wrs;
2137                 stats->value[EFA_RDMA_WRITE_BYTES] = rws->write_bytes;
2138                 stats->value[EFA_RDMA_WRITE_WR_ERR] = rws->write_wr_err;
2139                 stats->value[EFA_RDMA_WRITE_RECV_BYTES] = rws->write_recv_bytes;
2140         }
2141
2142         return ARRAY_SIZE(efa_port_stats_descs);
2143 }
2144
2145 int efa_get_hw_stats(struct ib_device *ibdev, struct rdma_hw_stats *stats,
2146                      u32 port_num, int index)
2147 {
2148         if (port_num)
2149                 return efa_fill_port_stats(to_edev(ibdev), stats, port_num);
2150         else
2151                 return efa_fill_device_stats(to_edev(ibdev), stats);
2152 }
2153
2154 enum rdma_link_layer efa_port_link_layer(struct ib_device *ibdev,
2155                                          u32 port_num)
2156 {
2157         return IB_LINK_LAYER_UNSPECIFIED;
2158 }
2159